cse • paper_1 • mechanicscse-2007-subject-01-004
Special Theory of Relativity — UPSC CSE 2007 Physics PYQ
Buy PYQ Solution Manual →An unstable particle has a lifetime of 5\text{ }\mu\text{s} in its own frame of reference and is moving towards the earth at a speed of 0.8\text{ C}. What will be the lifetime of the particle to an observer on the earth ?
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